旧PREP CR2-01求指教

gerlina

1.(24021-!-item-!-188;#058&000691)

On Pacific islands, a newly arrived gecko species, the house gecko, is displacing the previously established mourning gecko in urban areas, but populations of the two species are more stable in rural areas far from human settlement.The house gecko does not attack the mourning gecko, but in areas where insects congregate it prevents the mourning gecko from feeding on them.
Which of the following contributes most to an explanation of the difference between gecko populations in urban and rural areas?

(A) In urban areas, geckos are valued because they eat so many insects.

(B) Geckos defend territories against other members of the same species.

(C) House geckos that arrive on islands are carried there in boats and planes.

(D) In places where there are lighted buildings, insects tend to gather around the light.

(E) Mourning geckos are all females and reproduce asexually, but house geckos reproduce sexually.

我没有看懂....我理解的是urban：HG>MG.rural:HG=MG...然后那句but in areas where insects congregate it prevents the mourning gecko from feeding on them.是HG阻止MG吃虫子。。。那个in areas是指哪个areas？答案也没理解== 请求高人指点。谢谢！！！

treewing929

我是新手, 我估計意思是:
gecko 食虫子, 但虫子聚集的地方(in areas), mourning gecko 便吃不到虫子.
答案: 在城市很多虫子聚集在燈上, 所以 mouring gecko 吃不到虫子了!! 而rural 地方沒有多電燈, 所以mouring gecko 不受影響!